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2. 8 Headphones You Can Comfortably Wear to Sleep - AOL

   www.aol.com/8-headphones-comfortably-wear-sleep...

   Sleep PROxs. Bonamour's sleep buds are upping the ante when it comes to incorporating the latest in sleep science. These teeny tiny buds connect to the Bonamour app, which has a library of ...

3. Closed-eye hallucination - Wikipedia

   en.wikipedia.org/wiki/Closed-eye_hallucination

   Closed-eye hallucination. Closed-eye hallucinations and closed-eye visualizations (CEV) are hallucinations that occur when one's eyes are closed or when one is in a darkened room. They should not be confused with phosphenes, perceived light and shapes when pressure is applied to the eye's retina, or some other non-visual external cause ...

4. Are Noise-Canceling Headphones Harmful to Your Ears? - AOL

   www.aol.com/noise-canceling-headphones-harmful...

   Key Takeaways: As the FDA does not regulate headphone volume, it’s up to us to self-regulate our listening volume. Noise canceling headphones can help keep your volume within a safe range, so ...

5. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Noise-cancelling headphones are headphones that suppress unwanted ambient sounds using active noise control (ANC). Active noise cancellation makes it possible to listen to audio content without raising the volume excessively. In an aviation environment, noise-cancelling headphones increase the signal-to-noise ratio significantly more than ...

6. Ganzfeld effect - Wikipedia

   en.wikipedia.org/wiki/Ganzfeld_effect

   The visual effect is described as the loss of vision as the brain cuts off the unchanging signal from the eyes. The result is "seeing black", [ citation needed ] an apparent sense of blindness. A flickering ganzfeld causes geometrical patterns and colors to appear, and this is the working principle for mind machines and the dream machine .

7. Rapid eye movement sleep - Wikipedia

   en.wikipedia.org/wiki/Rapid_eye_movement_sleep

   Rapid eye movement sleep (REM sleep or REMS) is a unique phase of sleep in mammals (including humans) and birds, characterized by random rapid movement of the eyes, accompanied by low muscle tone throughout the body, and the propensity of the sleeper to dream vividly. The REM phase is also known as paradoxical sleep (PS) and sometimes ...